Malicious PDF — malware analysis report

Static analysis result for SHA-256 56e0ad7d63de4da6…

MALICIOUS

PDF

85.5 KB Created: 2021-07-09 05:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: e6d78f7c4af1aba40c9342c67dd68d31 SHA-1: b193323babed10893f8f905a514533e9c6f473eb SHA-256: 56e0ad7d63de4da6412532bcc62fffc449a310b2285a7dad9c7af3fd36864815
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL analysis point to a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://nguyenvanhuongloc.vn/app/webroot/files/images/pages/files/66388413835.pdf In PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a21f4c8721c---56430841146.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/43937995958.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210703204209648.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/879bc30ef95915b232fd8137b0c4300b/27958131608.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/8c48e851180fde8a22ad06f1b4334026/75657438658.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/xijimaxutaxarixenuzepobu.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908babd79a3---butajobatadarowijuna.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/d38f938a74f114e2d6f6158067d1a0c7/gukaxur.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/7632924194.pdfIn PDF document text
    • http://accronline.com/userfiles/file/29276882340.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/nemikalove.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/93761876422.pdfIn PDF document text
    • https://ajur.rest/uploads/userfiles/file/bimef.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/juxiziruzenalepogiwoxaku.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a22ac6be9bc---33442016492.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a42266020d---rifubitajififidirodobi.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/62935933908.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/78069599376.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/0ef1dce6ded9b2d61a017a06135c09ed/wibabozamutulaka.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/januzufozudaje.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608dffc175736---61913207223.pdfIn PDF document text
    • https://bnovum.hu/downloads/jasilupofejawede.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/c5fe5af52957229410a555cfbc1c88c1/29935736519.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607451ab88ae8---nokijusaruzonevivoxotaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=unkilled+all+weaponsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88D 18672 bytes
SHA-256: 4f4ebe2e71ab6eac6ed517b52c689431da735853566314f427c084e74c9270ed
font_01_sfnt_off000117d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D3 10372 bytes
SHA-256: d31e5f33d133dea4d47b527bae6b56fceac416a9dd40f63f292ae1d6633422de
font_02_sfnt_off00012f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.